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14 March, 05:08

A building 84 ft high casts a 231-ft shadow. Sarah casts a 11-ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah?

a) 4 feet

b) 3 feet

c) 6 feet

d) 5 feet

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Answers (2)
  1. 14 March, 06:53
    0
    231/11 = 84/X = > X = 11 * 84 / 231 = 4 = > Sara is 4 feet tall.
  2. 14 March, 07:43
    0
    So 84 casts 231

    then x casts 11

    84/231=x/11

    solve for x

    mulitply both sides by 11

    924/231=x=4

    sarah is 4 feet
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